QRPbm.php

<?php
/**
 * Class QRPbm
 *
 * @created      11.12.2025
 * @author       wgevaert
 * @copyright    2025 wgevaert
 * @license      MIT
 */
declare(strict_types=1);

namespace chillerlan\QRCode\Output;

use chillerlan\QRCode\Output\QROutputAbstract;

class QRPbm extends QROutputAbstract {

	private const LIGHT_DARK = [ '0', '1' ];

	protected function prepareModuleValue( mixed $value ): mixed {
		return $value;
	}

	protected function getDefaultModuleValue( bool $isDark ): mixed {
		return $isDark ? self::LIGHT_DARK[1] : self::LIGHT_DARK[0];
	}

	public static function moduleValueIsValid( mixed $value): bool {
		return is_string( $value ) && in_array( $value, self::LIGHT_DARK, true );
	}

	public function dump( string|null $file = null ): mixed {
		$size = $this->matrix->getSize();
		$qrString = "P1\n"
                    .$size.' '.$size."\n";
		foreach($this->matrix->getBooleanMatrix() as $row) {
			foreach ($row as $isDark) {
				$qrString .= $this->getDefaultModuleValue( $isDark );
			}
			$qrString .= "\n";
		}
		if ( is_string($file) ) {
			$writeResult = file_put_contents($file,$qrString);
			if ( $writeResult === false ) {
				throw new QRCodeOutputException('Cannot write data to cache file: '.$file);
			}
		}
		return $qrString;
	}
}